DIY: Diagnostic Outputs
Immobilizer (flashing key light) diagnostic procedure
Here are some random diagnostic outputs to use while troubleshooting.
Let me know if I missed any outputs that can be useful and I'll update this post.
Instrument Cluster:
01 = Buckle switch
04 = Door switch
08 = TNS relay
12 = Speedometer
13 = Tachometer
14 = Buzzer
16 = Fuel-level warning light
18 = Ignition key illumination
22 = Fuel gauge sender unit
23 = Fuel gauge
25 = Water temperature gauge
26 = Odometer tripmeter, warning and indicator light
28 = Oil pressure gauge
31 = Key reminder switch
55 = Dimmer switch
Speaker Inspection (Test Tone)
LCD Inspection:
Button Inspection:
Temperature Control ****:
Radio Reception Condition Inspection:
On-Board Diagnostic (Audio)
.1 09: ER20
__|_______|___________|_
Supplier..Device...........DTC
Supplier Code:
1 = FMS audio
2 = Panasonic
3 = CLARION
Device code:
00 = Cassette Deck
03 = CD player
05 = CD Changer (external)
06 = CD Changer (upper module)
07 = MD player
09 = Base Unit
10 = CD player system MP3 operation
Memory Clearing Procedure
1. Start the on-board diagnostic test mode
2. While pressing the ‘POWER’ button, simultaneously press the ‘AUDIO CONT’ button for 2 seconds or more.
3. To stop the on-board diagnostic test mode, turn the ignition switch to the ‘LOCK’ position
DTC Table (Audio System)
09: Er22 = Base unit (peripheral circuit for tuner)
09: Er20 = Power supply circuit to base unit
00: Er10 = Cassette deck communication circuit system
03: Er10 = CD player communication circuit system
05: Er10 = CD changer (external) communication circuit system
06: Er10 = CD changer (upper module) communication circuit system
07: Er10 = MD player communication circuit systemo
03: Er01 = CD player system
03: Er02 = CD player system
03: Er07 = CD player system
00: Er01 = Cassette deck system
00: Er03 = Cassette deck system
00: Er04 = Cassette tape system
05: Er01 = CD changer (external) system
05: Er07 = CD changer (external) system
06: Er01 = CD changer (upper module) system
06: Er02 = CD changer (upper module) system
06: Er07 = CD changer (upper module) system
07: Er01 = MD player system
07: Er02 = MD player system
07: Er07 = MD player system
07: Er08 = MD system
10: Er01 = CD player system MP3 operation
10: Er02 = CD player system MP3 operation
no Er = No DTCs stored
Immobilizer System (DTC Inspection)
Security light flash pattern:
∩__∩_________ = No detected communication with the coil
∩__∩∩________ = Coil malfunction
∩__∩∩∩_______ = The key ID number data cannot be read or key ID registration error
∩__∩∩∩∩______ = The keyless control module cannot read key ID number data normally
∩__∩∩∩∩∩_____ = The keyless control module has detected unregistered key ID number
∩__∩∩∩∩∩∩____ = Communication error between the keyless control module and the PCM (no response or mismatched conditions)
∩∩__∩_________= Only one key ID number is registered
∩∩__∩∩_______ = Communication error between the keyless control module and the PCM (data transfer error)
∩∩__∩∩∩______ = ID number data in the PCM and the keyless control module do not match.
NOT ILLUMINATED = Keyless control module malfunction
Let me know if I missed any outputs that can be useful and I'll update this post.
Instrument Cluster:
- Put the key in the ignition
- Push and hold the odometer button
- Turn the key to the 'ON' position (do not start the car)
- Continue to hold the odometer button until 'test' appears in the lower right corner
- Once 'test' appears, you can release the button
- Now push (not hold) the odometer button to scroll through various numbered options
- Stop when you reach the desired output
- After a full second the output signal should toggle (ex: light illuminates, gauge sweeps)
- Some have an on/off switch (ex: Buckle switch changes state when the seat belt is buckled)
- To exit from the output diagnostic, simply turn the key to the 'off' position and back on.
01 = Buckle switch
04 = Door switch
08 = TNS relay
12 = Speedometer
13 = Tachometer
14 = Buzzer
16 = Fuel-level warning light
18 = Ignition key illumination
22 = Fuel gauge sender unit
23 = Fuel gauge
25 = Water temperature gauge
26 = Odometer tripmeter, warning and indicator light
28 = Oil pressure gauge
31 = Key reminder switch
55 = Dimmer switch
Speaker Inspection (Test Tone)
- With the audio power on, press the 'POWER' button and simultaneously press the 'AUTO-M' button for roughly 1 second.
- It will generate a test tone in the following order:
1st- Front driver-side door speaker and tweeter.
2nd- Front passenger-side door speaker and tweeter.
3rd- Driver-side rear speaker.
4th- Passenger-side rear speaker.
LCD Inspection:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘SEEK’ button for approximately 1 second
- All the LCDs will illuminate. Inspect for any bad characters.
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
Button Inspection:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘CLOCK’ button for approximately 1 second
- Press all the buttons. A buzzer sounds with each button pressed.
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
Temperature Control ****:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘SCAN-UP’ button for approximately 1 second
- "A/C TEMP" should appear on the left side of the LCD display and a number from 0 to 16 on the right.
- The number advances in increments of 1 as you turn the temperature control ****
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
Radio Reception Condition Inspection:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘PRESET 2’ button for approximately 1 second.
- Even if the system is normal, radio reception may be difficult depending on where the system is inspected (indoors/outdoors, or conditions at the location). Before inspecting the system, verify that radio reception is adequate
- When inspecting, select a frequency band (radio station) with the best reception
LEV- 5 through LEV- 9 = Antenna, antenna feeder and base unit are normal
LEV- 3 through LEV- 4 = Change the frequency (radio station) and inspect again
LEV- 0 through LEV- 2 = Malfunction present
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
On-Board Diagnostic (Audio)
- Turn the ignition to the ‘ACC’ or ‘ON’ position
- While pressing the ‘POWER’ button, simultaneously press the ‘AM’ button and the ‘TAPE/MD’ button for 2 seconds or more
- If several DTCs are in memory, they can display using the ‘SEEK’ button
- If no DTC is stored, no codes will be displayed
- To stop the on-board diagnostic test mode, turn the ignition switch to the 'LOCK' position
.1 09: ER20
__|_______|___________|_
Supplier..Device...........DTC
Supplier Code:
1 = FMS audio
2 = Panasonic
3 = CLARION
Device code:
00 = Cassette Deck
03 = CD player
05 = CD Changer (external)
06 = CD Changer (upper module)
07 = MD player
09 = Base Unit
10 = CD player system MP3 operation
Memory Clearing Procedure
1. Start the on-board diagnostic test mode
2. While pressing the ‘POWER’ button, simultaneously press the ‘AUDIO CONT’ button for 2 seconds or more.
3. To stop the on-board diagnostic test mode, turn the ignition switch to the ‘LOCK’ position
DTC Table (Audio System)
09: Er22 = Base unit (peripheral circuit for tuner)
09: Er20 = Power supply circuit to base unit
00: Er10 = Cassette deck communication circuit system
03: Er10 = CD player communication circuit system
05: Er10 = CD changer (external) communication circuit system
06: Er10 = CD changer (upper module) communication circuit system
07: Er10 = MD player communication circuit systemo
03: Er01 = CD player system
03: Er02 = CD player system
03: Er07 = CD player system
00: Er01 = Cassette deck system
00: Er03 = Cassette deck system
00: Er04 = Cassette tape system
05: Er01 = CD changer (external) system
05: Er07 = CD changer (external) system
06: Er01 = CD changer (upper module) system
06: Er02 = CD changer (upper module) system
06: Er07 = CD changer (upper module) system
07: Er01 = MD player system
07: Er02 = MD player system
07: Er07 = MD player system
07: Er08 = MD system
10: Er01 = CD player system MP3 operation
10: Er02 = CD player system MP3 operation
no Er = No DTCs stored
Immobilizer System (DTC Inspection)
- Turn the ignition switch to the ‘ON’ position
- Verify the security light state.
- If there are any malfunctions:
- After any malfunction is detected, the security light will function as follows for approximately 1 min.
DTC 16 and lower: Flashes
DTC21 and higher: Illuminates
- After any malfunction is detected, the security light will function as follows for approximately 1 min.
- If there are no malfunctions:
- The security light illuminates for approximately 3 seconds and goes out.
- If there are any malfunctions:
- When any malfunction has been detected, read DTCs via flashing patterns displayed after the security light flashes or illuminates for approximately 1 minute.
- A verified DTC is flashed 10 times repeatedly by the security light.
- If multiple DTCs are verified, the security light displays only the smallest DTC.
Security light flash pattern:
∩__∩_________ = No detected communication with the coil
∩__∩∩________ = Coil malfunction
∩__∩∩∩_______ = The key ID number data cannot be read or key ID registration error
∩__∩∩∩∩______ = The keyless control module cannot read key ID number data normally
∩__∩∩∩∩∩_____ = The keyless control module has detected unregistered key ID number
∩__∩∩∩∩∩∩____ = Communication error between the keyless control module and the PCM (no response or mismatched conditions)
∩∩__∩_________= Only one key ID number is registered
∩∩__∩∩_______ = Communication error between the keyless control module and the PCM (data transfer error)
∩∩__∩∩∩______ = ID number data in the PCM and the keyless control module do not match.
NOT ILLUMINATED = Keyless control module malfunction
Thanks BC! IT looks like this is the immobilizer code I'm getting
Seriously, Thank you!
∩__∩∩∩∩∩∩____ = Communication error between the keyless control module and the PCM (no response or mismatched conditions)
New Member
Joined: Oct 2016
Posts: 4
Likes: 0
From: Sandy, Oregon
+1 It is very useful, on that note I am hoping you all can assist in interpreting this code;
104
22 237
Literally appeared in the odometer after displaying the previously mentioned. I am attaching a pic. This appeared and the car began to miss, all of this is following a MAF clean and memory reset. The end of my drive to work and the car sounded funny when I opened the door, heardissing and possibly a vacuum leak.
No OBD codes, no indication outside of this little interesting display.
Thanks for any insight in advance!
104
22 237
Literally appeared in the odometer after displaying the previously mentioned. I am attaching a pic. This appeared and the car began to miss, all of this is following a MAF clean and memory reset. The end of my drive to work and the car sounded funny when I opened the door, heardissing and possibly a vacuum leak.
No OBD codes, no indication outside of this little interesting display.
Thanks for any insight in advance!
Mine was because the original key was so worn it wasn't engaging the ignition properly, while the chip in the key and everything on the car was working fine.
New Member
Joined: Apr 2018
Posts: 2
Likes: 0
From: California
Here are some random diagnostic outputs to use while troubleshooting.
Let me know if I missed any outputs that can be useful and I'll update this post.
Instrument Cluster:
01 = Buckle switch
04 = Door switch
08 = TNS relay
12 = Speedometer
13 = Tachometer
14 = Buzzer
16 = Fuel-level warning light
18 = Ignition key illumination
22 = Fuel gauge sender unit
23 = Fuel gauge
25 = Water temperature gauge
26 = Odometer tripmeter, warning and indicator light
28 = Oil pressure gauge
31 = Key reminder switch
55 = Dimmer switch
Speaker Inspection (Test Tone)
LCD Inspection:
Button Inspection:
Temperature Control ****:
Radio Reception Condition Inspection:
On-Board Diagnostic (Audio)
.1 09: ER20
__ _______ ___________ _
Supplier..Device...........DTC
Supplier Code:
1 = FMS audio
2 = Panasonic
3 = CLARION
Device code:
00 = Cassette Deck
03 = CD player
05 = CD Changer (external)
06 = CD Changer (upper module)
07 = MD player
09 = Base Unit
10 = CD player system MP3 operation
Memory Clearing Procedure
1. Start the on-board diagnostic test mode
2. While pressing the ‘POWER’ button, simultaneously press the ‘AUDIO CONT’ button for 2 seconds or more.
3. To stop the on-board diagnostic test mode, turn the ignition switch to the ‘LOCK’ position
DTC Table (Audio System)
09: Er22 = Base unit (peripheral circuit for tuner)
09: Er20 = Power supply circuit to base unit
00: Er10 = Cassette deck communication circuit system
03: Er10 = CD player communication circuit system
05: Er10 = CD changer (external) communication circuit system
06: Er10 = CD changer (upper module) communication circuit system
07: Er10 = MD player communication circuit system
03: Er01 = CD player system
03: Er02 = CD player system
03: Er07 = CD player system
00: Er01 = Cassette deck system
00: Er03 = Cassette deck system
00: Er04 = Cassette tape system
05: Er01 = CD changer (external) system
05: Er07 = CD changer (external) system
06: Er01 = CD changer (upper module) system
06: Er02 = CD changer (upper module) system
06: Er07 = CD changer (upper module) system
07: Er01 = MD player system
07: Er02 = MD player system
07: Er07 = MD player system
07: Er08 = MD system
10: Er01 = CD player system MP3 operation
10: Er02 = CD player system MP3 operation
no Er = No DTCs stored
Immobilizer System (DTC Inspection)
Security light flash pattern:
∩__∩_________ = No detected communication with the coil
∩__∩∩________ = Coil malfunction
∩__∩∩∩_______ = The key ID number data cannot be read or key ID registration error
∩__∩∩∩∩______ = The keyless control module cannot read key ID number data normally
∩__∩∩∩∩∩_____ = The keyless control module has detected unregistered key ID number
∩__∩∩∩∩∩∩____ = Communication error between the keyless control module and the PCM (no response or mismatched conditions)
∩∩__∩_________= Only one key ID number is registered
∩∩__∩∩_______ = Communication error between the keyless control module and the PCM (data transfer error)
∩∩__∩∩∩______ = ID number data in the PCM and the keyless control module do not match.
NOT ILLUMINATED = Keyless control module malfunction
Let me know if I missed any outputs that can be useful and I'll update this post.
Instrument Cluster:
- Put the key in the ignition
- Push and hold the odometer button
- Turn the key to the 'ON' position (do not start the car)
- Continue to hold the odometer button until 'test' appears in the lower right corner
- Once 'test' appears, you can release the button
- Now push (not hold) the odometer button to scroll through various numbered options
- Stop when you reach the desired output
- After a full second the output signal should toggle (ex: light illuminates, gauge sweeps)
- Some have an on/off switch (ex: Buckle switch changes state when the seat belt is buckled)
- To exit from the output diagnostic, simply turn the key to the 'off' position and back on.
01 = Buckle switch
04 = Door switch
08 = TNS relay
12 = Speedometer
13 = Tachometer
14 = Buzzer
16 = Fuel-level warning light
18 = Ignition key illumination
22 = Fuel gauge sender unit
23 = Fuel gauge
25 = Water temperature gauge
26 = Odometer tripmeter, warning and indicator light
28 = Oil pressure gauge
31 = Key reminder switch
55 = Dimmer switch
Speaker Inspection (Test Tone)
- With the audio power on, press the 'POWER' button and simultaneously press the 'AUTO-M' button for roughly 1 second.
- It will generate a test tone in the following order:
1st- Front driver-side door speaker and tweeter.
2nd- Front passenger-side door speaker and tweeter.
3rd- Driver-side rear speaker.
4th- Passenger-side rear speaker.
LCD Inspection:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘SEEK’ button for approximately 1 second
- All the LCDs will illuminate. Inspect for any bad characters.
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
Button Inspection:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘CLOCK’ button for approximately 1 second
- Press all the buttons. A buzzer sounds with each button pressed.
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
Temperature Control ****:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘SCAN-UP’ button for approximately 1 second
- "A/C TEMP" should appear on the left side of the LCD display and a number from 0 to 16 on the right.
- The number advances in increments of 1 as you turn the temperature control ****
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
Radio Reception Condition Inspection:
- With the audio power on, press the ‘POWER’ button and simultaneously press the ‘PRESET 2’ button for approximately 1 second.
- Even if the system is normal, radio reception may be difficult depending on where the system is inspected (indoors/outdoors, or conditions at the location). Before inspecting the system, verify that radio reception is adequate
- When inspecting, select a frequency band (radio station) with the best reception
LEV- 5 through LEV- 9 = Antenna, antenna feeder and base unit are normal
LEV- 3 through LEV- 4 = Change the frequency (radio station) and inspect again
LEV- 0 through LEV- 2 = Malfunction present
- Turn the audio off or the ignition switch to the ‘LOCK’ position to stop the diagnostic assist function.
On-Board Diagnostic (Audio)
- Turn the ignition to the ‘ACC’ or ‘ON’ position
- While pressing the ‘POWER’ button, simultaneously press the ‘AM’ button and the ‘TAPE/MD’ button for 2 seconds or more
- If several DTCs are in memory, they can display using the ‘SEEK’ button
- If no DTC is stored, no codes will be displayed
- To stop the on-board diagnostic test mode, turn the ignition switch to the 'LOCK' position
.1 09: ER20
__ _______ ___________ _
Supplier..Device...........DTC
Supplier Code:
1 = FMS audio
2 = Panasonic
3 = CLARION
Device code:
00 = Cassette Deck
03 = CD player
05 = CD Changer (external)
06 = CD Changer (upper module)
07 = MD player
09 = Base Unit
10 = CD player system MP3 operation
Memory Clearing Procedure
1. Start the on-board diagnostic test mode
2. While pressing the ‘POWER’ button, simultaneously press the ‘AUDIO CONT’ button for 2 seconds or more.
3. To stop the on-board diagnostic test mode, turn the ignition switch to the ‘LOCK’ position
DTC Table (Audio System)
09: Er22 = Base unit (peripheral circuit for tuner)
09: Er20 = Power supply circuit to base unit
00: Er10 = Cassette deck communication circuit system
03: Er10 = CD player communication circuit system
05: Er10 = CD changer (external) communication circuit system
06: Er10 = CD changer (upper module) communication circuit system
07: Er10 = MD player communication circuit system
03: Er01 = CD player system
03: Er02 = CD player system
03: Er07 = CD player system
00: Er01 = Cassette deck system
00: Er03 = Cassette deck system
00: Er04 = Cassette tape system
05: Er01 = CD changer (external) system
05: Er07 = CD changer (external) system
06: Er01 = CD changer (upper module) system
06: Er02 = CD changer (upper module) system
06: Er07 = CD changer (upper module) system
07: Er01 = MD player system
07: Er02 = MD player system
07: Er07 = MD player system
07: Er08 = MD system
10: Er01 = CD player system MP3 operation
10: Er02 = CD player system MP3 operation
no Er = No DTCs stored
Immobilizer System (DTC Inspection)
- Turn the ignition switch to the ‘ON’ position
- Verify the security light state.
- If there are any malfunctions:
- After any malfunction is detected, the security light will function as follows for approximately 1 min.
DTC 16 and lower: Flashes
DTC21 and higher: Illuminates
- After any malfunction is detected, the security light will function as follows for approximately 1 min.
- If there are no malfunctions:
- The security light illuminates for approximately 3 seconds and goes out.
- If there are any malfunctions:
- When any malfunction has been detected, read DTCs via flashing patterns displayed after the security light flashes or illuminates for approximately 1 minute.
- A verified DTC is flashed 10 times repeatedly by the security light.
- If multiple DTCs are verified, the security light displays only the smallest DTC.
Security light flash pattern:
∩__∩_________ = No detected communication with the coil
∩__∩∩________ = Coil malfunction
∩__∩∩∩_______ = The key ID number data cannot be read or key ID registration error
∩__∩∩∩∩______ = The keyless control module cannot read key ID number data normally
∩__∩∩∩∩∩_____ = The keyless control module has detected unregistered key ID number
∩__∩∩∩∩∩∩____ = Communication error between the keyless control module and the PCM (no response or mismatched conditions)
∩∩__∩_________= Only one key ID number is registered
∩∩__∩∩_______ = Communication error between the keyless control module and the PCM (data transfer error)
∩∩__∩∩∩______ = ID number data in the PCM and the keyless control module do not match.
NOT ILLUMINATED = Keyless control module malfunction
i can sleep!!!
Registered
Joined: Nov 2021
Posts: 146
Likes: 12
∩__∩∩∩∩∩∩____ = Communication error between the keyless control module and the PCM (no response or mismatched conditions)
Any and all possible solutions that worked for this would be much appreciated
Seems like the list is long
y
could be a key
Could be the keyless module
Could be the pcm
could be any of a bunch of fuses
could be the keyless antenna
Curious as I got this problem after replacing coils, wires and also a clutch master cylinder
now stuck with this when I just want to tear the engine out but dont want to.come back to this issue with a new engine
Thanks
Any and all possible solutions that worked for this would be much appreciated
Seems like the list is long
y
could be a key
Could be the keyless module
Could be the pcm
could be any of a bunch of fuses
could be the keyless antenna
Curious as I got this problem after replacing coils, wires and also a clutch master cylinder
now stuck with this when I just want to tear the engine out but dont want to.come back to this issue with a new engine
Thanks
Registered
Joined: Jul 2009
Posts: 27
Likes: 0
From: Navarre, FL
I don't know how much traffic there is on this site but, fwiw, I'm a vietnam vet and an 04 rx8 6 speed owner since 2007. A couple days ago i switched the engine off and coasted to a stop in the taco bell drive through lane here in Florida. After receiving my food, when attempting to restart the car: nothing, no clicks or anything. I managed to push start the car in the drive through lane, drove it home and it's been disabled ever since, Checked all the fuses none were blown. Battery was a little weak so replaced it today and cleaned up what corrosion was on the terminals with the result the same. The immobilizer flashes once every 2 seconds constantly when there is no key in the ignition. It does likewise with the key in the ignition in the off position and also in the accessory position. Upon turning the ignition to the on position however, the security light illuminates for 3 seconds then goes out and stops flashing, the DSC OFF indicator flashes even though It wasn't doing that before this incident. If I'm reading this Immobilizer system DTC inspection chart correctly, that means there are no faults but indicates a keyless control module malfunction. Could someone who has experience with this explain what's involved in replacing this keyless control module or if that will even solve the problem. Thanks for your help.
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